TEKNOZINC 3231
Epoxy zinc-rich primer
- Corrosion protective
- 2-component
- Solvent-borne
- Primer
TEKNOZINC 3231 is a two-component high-solid epoxy zinc-rich primer.
Primer for Polysiloxane-, Polyurethane- and Epoxy systems. TEKNOZINC 3231 gives effective corrosion protection and is weather resistant even without the topcoat. It provides long overcoating intervals. The content of zinc in dry film is minimum 90%.
Surface preparation
Remove from the surfaces any contaminants that might be detrimental to surface preparation and application. Remove also water-soluble salts by using appropriate methods. The surfaces are prepared according to the different materials as follows:
STEEL SURFACES: Remove mill scale and rust by blast cleaning to preparation grade Sa 2½ (standard ISO 8501-1).
OLD PAINTED SURFACES SUITABLE FOR OVERCOATING: Any impurities that might be detrimental to the application of paint (e.g. grease and salts) are removed. The surfaces must be dry and clean. Old, painted surfaces that have exceeded the maximum overcoating time are to be roughened as well.
The place and time of the preparation are to be chosen so that the prepared surface will not get dirty or damp before the subsequent treatment.
Additional instructive information for surface preparation can be found in standards EN ISO 12944-4 and ISO 8501-2.
Application
Take into consideration the pot life of the mixture when estimating the amount to be mixed at a time. Before application the base and hardener are mixed in right proportion. Stir thoroughly down to the bottom of the vessel. Inadequate stirring or incorrect mixing ratio results in imperfect curing and impaired film properties.
Stir thoroughly before use.
All equipment that will be in direct contact with the paint must be cleaned before use with a thinner suitable for the paint.
For this coating system we recommend the usage of dual-feed equipment.
If needed the paint can be diluted with TEKNOSOLV 6720.
Suitable airless nozzle size (turn-nozzle) 0.017 - 0.021".
Stir the paint frequently in the course of work, about every 30 minutes in order to prevent sedimentation of the zinc dust.
Application conditions
The surface to be treated must be dry. During the application and drying period the temperature of the ambient air, the surface and the product shall be above +10°C and the relative air humidity below 80%. Additionally, the temperature of the surface to be treated and the product must be at least +3°C above the dew point of the ambient air.
Storage
The storage stability is shown on the label. Store in a cool place and in tightly closed containers.
| Solids | abt. 53 % by volume |
|---|---|
| Weight solids | abt. 83 % by weight |
| Volatile organic compound (VOC) | abt. 418 g/l |
| Pot life | 16 h (+23 °C) |
| Mixing ratio | 4:1 by volume (comp. A : comp. B) |
| Hardener | Comp. B: TEKNOZINC HARDENER 3231 |
| Gloss | Matt |
| Density | abt. 2.5 g/ml |
| Practical spreading rate | The values depend on the application technique, surface conditions, overspray, etc. |
| Drying time – dust free | 15 min |
| Drying time – touch dry | 45 min |
| Drying time – forced drying | 1 h at 60°C |
| Thinner | TEKNOSOLV 6720 |
| Clean up | TEKNOSOLV 6720 |
| Colours | reddish grey |
| Safety markings | See safety data sheet. |